Test

sudo yum groupinstall "Development Tools"
sudo yum install epel-release.noarch
sudo yum install yum-utils rpmdevtools

mkdir -p ~/rpmbuild/{SOURCES,SPECS}
wget http://example.com/lame-3.99.5.tar.gz
mv lame-3.99.5.tar.gz ~/rpmbuild/SOURCES
rpmdev-newspec lame
mv lame.spec ~/rpmbuild/SPECS
cat < < EOF > ~/rpmbuild/SPECS/lame.spec
# ------------------------------------------------------------
Name:           lame
Version:        3.99.5
Release:        1%{?dist}
Summary:        LAME MP3 Encoder

License:        N/A
Source0:        lame-3.99.5.tar.gz

%description
Educational tool to be used for learning about MP3 encoding. LAME aims to be the basis of a patent free audio compression codec.


%prep
%setup -q


%build
%configure
make %{?_smp_mflags}


%install
rm -rf $RPM_BUILD_ROOT
%make_install


%files
%doc
/usr/bin/lame
%dir /usr/include/lame
/usr/include/lame/*
/usr/lib64/*
/usr/share/doc/lame/html
/usr/share/man/man1/lame.1.gz

%changelog
# ------------------------------------------------------------
EOF
rpmbuild -ba ~/rpmbuild/SPECS/lame.spec
sudo rpm -Uvh ~/rpmbuild/RPMS/x86_64/lame-3.99.5-1.el7.centos.x86_64.rpm 


yumdownloader --source sox
sudo yum-builddep sox-14.4.1-6.el7.src.rpm 
rpm -i sox-14.4.1-6.el7.src.rpm 
vi ~/rpmbuild/SPECS/sox.spec
:  Add "--with-lame" to the configure line
%configure --with-lame
:
rpmbuild -ba ~/rpmbuild/SPECS/sox.spec 
sudo rpm -Uvh ~/rpmbuild/RPMS/x86_64/sox-14.4.1-6.el7.centos.x86_64.rpm
sox | grep mp3

References: https://fedoraproject.org/wiki/How_to_create_an_RPM_package

I can’t believe how many times I forget this trick! so I am writing it down so I won’t forget it!

Normally when you use printf function with “%s” formatting to print a string (char *) you rely on C convention of terminating a string with a NULL character (i.e. value 0).

So if you want to print small part of longer string, you copy the part you need to a new buffer and terminate it will NULL.

In Django web applications I usually have a single template file for navigation or bread crumb that I include from other template files, it is easy and straight forward to pass parameter to the included template file, some thing like:

{% include "nav.html" with title="title" object=my_object %}

But it would be a little tricker to send a URL as a parameter, i.e. you can’t write it:

{# WRONG DOESN'T WORK #}
{% include "nav.html" with title="title" link={% url 'book_edit'%} %}

But luckily Django have a decent and elegant solution, you can use “url” template function with “as” parameter, which will not display but will store it in a variable that you can use later in the include function:

I’ve written before about implementing CRUD operations on a single table in Django, and the post was very popular on my blog and I hope many people learned something from it.

The next logical step is to write a CRUD application with Parent/Child relationship, the application is bit more verbose but it follow the same simple logic used in the first post.

In fact I didn’t write a single application, I wrote five stand alone applications that shows different ways to implement CRUD operations:

كتبت رسالة الى معالي الدكتور محمد السويل وزير الاتصالات باقتراحات لتفعيل خدمة لاسلكي الهواة او ما يعرف بـ “Amature Radio” او “Ham Radio” ردا على طلبه للعموم باقتراحات لتطوير خدمة الاتصالات في المملكة:
https://twitter.com/MIsuwaiel/status/580704446520291328
وفي ما يلي نصها، للتاريخ وكذلك كمرجع لي.

السلام عليكم ورحمة الله،

معالي الدكتور محمد السويل اكتب لكم بمقترحات لتشجيع خدمة لاسلكي الهواة في المملكة العربية السعودية.

قبل قرابة السنتين احببت ان اتعلم تقنيات اللاسلكي ولاسلكي الهواة لاكتشف عدة عوائق لاستخدام الخدمة في المملكة.

I’ve just published my first public Python package “pyagentx”, the package will help you build “AgentX” agents to extend a master SNMP agent.

Let’s assume that you want to monitor your custom application from your Network Managment System (NMS), but the NMS only speak SNMP, this package allows you to extend the master SNMP agent to include your custom application metrics.

Project page on Github

Package page on Python Package Index

Every time I work with Image or File fields in Django I forget some tiny detail that waste 10-20 minutes until I remember what was I missing, I always say I will remember it next time but I never do! so I made a list of common errors I keep doing while working with Image/File fields:

For complete working project: (https://github.com/rayed/dj-imagefield-example)

Setting MEDIA_URL and MEDIA_ROOT

Make sure you set proper values for MEDIA_URL and MEDIA_ROOT in your settings.py, e.g. I use the following structure: